ri2 PALECZOIC FISHES OF NORTH AMERICA. 
Formation and locality : Catskill group; Mansfield, Tioga County, Pa. 
Collected by Audrew Sherwood. 
BoTHRIOLEPIS MINOR, 0. sp. 
Plate XX, Fig. 6-8. 
Body plates elliptical or angular in outline, from half an inch to one 
and a half inches in longest diameter, many hexagonal, but longer than 
broad; under surface often carrying a strong keel along the central line; 
the outer surface covered with fine, closely crowded, vermicular furrows, 
and also by divergent lines passing from the center to the middle of the 
three posterior margins. 
This species is distinguished from the preceding one by the smaller 
size of the plates and the very much finer ornamentation of the surface. 
The material which I have representing it includes no portion of the head 
or arms, and therefore no extended comparison can be made. The two 
species, however, occur at different horizons, and are represented by hun- 
dreds of plates, all of which may be distinguished at a glance by the differ- 
ence in the surface ornamentation. A species similar to this, and perhaps 
identical with it, has been found by M. Lohest in the Psammite de Condroz, 
near Liege, Belgium. 
Formation and locality: Chemung group; Le Roy, Bradford County, 
Pa. Collected by Mr. A. T. Lilley. 
Order CROSSOPTERYGID&. 
Genus SAURIPTERIS, Hall. 
In his notice of the Catskill fishes of New York! Professor Hall de- 
scribes a portion of the shoulder girdle, a pectoral fin, and some scales of a 
large fish found near Blossburgh, Pa., to which he gave the name of Sawrip- 
teris Taylori. Waving recently had an opportunity, through the courtesy of 
Prof. R. P. Whitfield, of examining the original specimens figured by Pro- 
fessor Hall, and many others obtained with them, now forming part of the 
collection of the American Museum of Natural History, I am able to con- 
‘Nat. Hist. New York, pt. 4, Geology, p. 282, pl. 3. 
